Ayako was a skinny girl highschool junior while Katakura was a chubby highschool senior. Since Ayako and Katakura met, Ayako have been giving Katakura food that she made and it had made Katakura chubby. Then Katakura's boyfriend, Mamiya, shows up and then Ayako left. As time passes, Ayako kept on giving Katakura more of her food and Katakura gain more weight. Then one day, Ayako give Katakura a drink that she had drugged and Katakura passed out. Once Katakura wakes up, she is tied to a chair in the school's kitchen with Ayako there baking a ton of sweets. Ayako then explain that she and Mimiya used to date but then he broke up with her for being fat, and years later she got skinny and sees that Mimiya is at the same highschool as her and once she realized that Mimiya is dating another girl, Katakura, she decide to fatten her up so that he would brake up with her and goes back into dating her again. She explains this as she was force-feeding Katakura all of the sweets that she made for this occasion, trying to get Katakura to her limit. While this was going, Mimiya was looking for Katakura and was looking around the school for her. Once Mimiya enters the school's kitchen, he sees Katakura tied to a chair with her shirt and skirt were unbuttoned by Ayako, who was force-feeding Katakura a large piping bag. Ayako then looked at Mimiya with a smile and starts saying how fat and ugly that Katakura is now and that he should start dating her(Ayako) again while she unbuttoned her shirt, showing her new slimmer body to Mimiya. But then, Mimiya said that he was into fat girls, which shocked both Ayako and Katakura. Ayano then asked why he did he broke up with her in the first place if he was into fat girls, in which he replied that she was more like a stalker to him than a girlfriend and then said that he does like Katakura for being chubby, and then Ayako cried and runs away. Some time passes, Katakura and Miniya are still dating but now Ayako had gained a lot of weight, more than Katakura(The story is now in your hands)